Sharpsman, You have completely missed the reason for "some folks" peep sights that have no windage adjustment. I make my sight to be small and unobtrusive, one that won't stand out and look gaudy on a flint longrifle. It is meant to be sighted in after a load is chosen that gives good accuracy. Windage is adjusted by the installer's skill in drilling and tapping dead center on the tang and by drifting the front sight for windage. After that the installation is considered to be permanent as long as the same load is used. But in reading your post I see you can't grasp that concept at all.
An adjustable tang sight such as you show in your photograph may be fine for some but has no place on one of my longrifles. Besides I would never request another person to "fit" a base or tang on my rifles, I can fit a part as well as anybody and if I couldn't it wouldn't get done.
My admiration goes to those who build or attempt to build their own rifles. No matter how it turns out. Some things they do are done because they have a personal vision that others can't understand. And they don't deserve thinly veiled criticism, especially when that criticism is accentuated by exclamation points.
If this continues, even from just a few, I think many would cease to participate in open forums.